Unigine are a busy little company. They make games, like 2012 RTS Oil Rush. They make PC benchmark tools. And they also make engines.

We're looking at a combination of the latter two here today, as this video takes us on a sweeping tour of an enormous, 64 square-kilometre wooded landscape that looks just perfect for, say, something like a big fantasy RPG.

What's cool is that, unlike more passive benchmarks, this acts as a demo for the engine itself, letting you either walk or fly around the environment in real-time.